Coating machine



March 26 1940 J. l. wcm-:us 2,195,323

COATING MACHINE Filed Feb. '7, 193e 2 sheets-sheet 1 l l l l l fveffzzaf" fw am www ZW@ March 26, 1940. .L l. rlcKELls 2,195,323`

COATING MACHINE Filed Feb. 7,- 193B l shuts-Sheet 2 36 I jezlaf #W7 awk? Y. Patented Mar. 26, 1940 f UNITEDLSTTES 'omc-4E,

\ COATING lnnim11`m: v 'j l l Y James 1...:rickeiis`, Haverhill; Massi. #.ltssigno'r-y il l, Bestco `Shoe Machinery Inc.; Ipswich,y Mass., ay

corporation of lvlassachusettsvr j 1 Application February '7, 1938-,V 'Serial No. 139,104

rennes". (o1. 12480),"

y The present invention consists in an yimproved machine for applying a liquid coating to an article or a portion thereof, a machine which? is useful for a variety of purposes but'which is par- 5' ticularly adapted for applying a band of cement upon theover-lasted margins of lasted shoes in vlthat process of manufacture wherein soles are secured to uppers by pyroxalin or other cement. Oneobject of my invention is to provide a Yl liquid .coating machine whereinthe liquid reser'f voir issubstantially sealed from air in order tor prevent excess evaporation and make possiblethe use of relatively volatileliquids as coating'. ma-

l terial'. Furthermore, byl preventing excess evap- .l oration, coagulation and increased viscosity` may be minimized;

A further object of my invention is to'provide angle to present ancinclined liquid carrying'surface.

An important feature of my invention'resides in a screw conveyor disposed within thereservoir 'and' arranged to deliver a constant supply of liquid to the innermost portion of the applicator..A

roll, v.in combination with a gauge for regulating the amount of liquid delivered outside the reserj voir by the applicator roll. v

Another feature of my inventionresides in a novel gate used for sealing the reservoir when the applicator roll is removed, so that themachine` may be left between intervals of use without undue loss of liquid from the reservoir or objection-y able hardening thereof on exposed parts.

These and other objects and features' of my 40 invention will Vbe best understoodand appreciated from 'the following description of preferred embodlmentsl thereof, selected for purposes of illustiationfand shown in the accompanying draw.- l

ings, in which Fig. .1 is -a view in side elevation and partly in section .of a Iliquid coating machine embodying my invention, Q n

Fig. 2 is a view in perspective of the applicator roll and gauge therefor, ff Fig. 3 is a view in perspective. showing the gate in position, and

Fig. 4 isa view in side elevationshowing de# tails of the gauge.

' My4 invention may be briey describedv as a liquid coating machine consisting of a4 reservoir for liquid, :an applicator roll arranged for rotation partially withinthe reservoir, a screw con- Veyor disposed inthe reservoir and larranged to discharge a predetermined, constant amount of :liquid upon 'the innermost surface of the 'ap- B plicator., A. sliding gauge is mounted adjacent y"the applicator, and manipulation thereof varies the''thickness-ofl the band of liquid carried upon the periphery of the applicator roll. To prevent hardening of-Viscous liquids on the applicator roll 10 the latter may be.` removed for cleaning when the .machine ishot; in operation.

its ends projectingl freelybeyond.thebearings 20 y Keyed to'theshaft Id between the bearings l5 and I6 is aworm wheel l1 in mesh with the worm I3.r On the freefends of the shaft Ill-'are keyed vbevel gears li!y and 2li. Integral with the bearing -l5 is a bearing 22 which supports a forwardly inyi215 clined applicator vshaft `2li to the lower end of whic'his secured a bevel gear 26 in constant mesh `withftheg; gear;`l9. 'l

The. upper portion of the'rnachine is inclosed in ajc'asing having a wall, 28 extending upwardly $0 and` forwardly vfrom the top ofthe base l0 and terminating at its upper end in a bearing 32. The

casing. `incloses. areservoir 30 spaced above the base-ii! andhaving a forwardly and upwardly `inclined.bottomI yThe reservoir 33 is provided 85 with ahinged'cover 34 which constitutes the forward portionof the reservoir inclosure. Aheaded screw 36in the cover 34 may be screwed into the iside .wail ofthe reservoir v30 to maintain the cover 34 in closedposition. i tio i Secured tothe upper end of the applicator( shaft 2d is' anfapplicator roll which comprises a` central metal hub 39, having an integral lower liange'and awremovable upper flange, and an outerconcentric roll 3870i hard corrugated rubgear -26`and the applicator shaft 24 upward. The bearingl dil resists this upward thrust, .being held down by the `set screw' 36.

Journaledin the bottom of the reservoirvv is an Q y inclined conveyor shaft 43 provided with 4an integral spiral flange or feather 44,` thus forming a screw conveyor. The lower end of the shaft 43 extends below the reservoir 30 and carries a bevelgear 45 which is in constant mesh `with the gear 20 on the driven shaft I4. A tubular metal casing 46 of circular cross section surrounds the shaft 43 and the iiange 44 and is lprovided with a stud 48 which seats in a recess in a large lug extending upwardly from the bottom of the reservoirV 38. A set screw 49 is threaded into the lug 41 and bears against the stud 48,4` thereby supporting the casing 26 in iixed posi-V tion. The `casing 46 terminates adjacent the innermost upper surface of the applicator roll The reservoir 38 is provided with a lling cover I and a drain plug 52. A curvedcover' plate 54 is screwed to the rear of the base I8 and the reservoir 38 to prevent dust and dirt from reaching the gears and bearings; Reference character 53 designates the presence of liquid in the reservoir 3|).`

' A gauge is shown in Figs. 2 and 4 in conjunction with the applicator roll 38. A rectangular block 5B is mounted to slide transversely in the upper end of the inclined wall 28 and isv provided with a vertical groove in its inner face into which fits a collar 59 integral with an" adjusting screw 51 threaded into the wall of the reservoir 38. The adjusting screw 51 has a knurled head 58 to facilitate manual adjustment. As the adjusting screw 51 is moved in aud out, the block 56 is carried with it. A hard rubber piece 6D? is secured to the inner end of the block 5B ybyascrew 52 (see Fig. 4) passing through a hole` in the block 56 and an elongated slot 6I Vin the rubber piece 50. The latter is notched at its inner end to iit over the periphery of the applicator roll 38. An elongated gate 63 is adapted tot into a slot on the end of the applicator shaft 24, when the applicator roll has been removed therefrom,

and to ll completely the opening vin the casing formerly voccupied by4 the applicator roll. .A notch is cut in the upper edge of the gate 13 to accommodate the cone point bearing v40. l

The operation of the machine when used for upper cementing will now be described. The reservoir 30 lis lled with a liquid cement having a volatile solvent. When-the overlasted margins of shoe uppers are to be coated with cement, a pyroxalin cement is used in the. reservoir.A The motor is then started, whereupon the shaft i4 is caused to rotate through the worm i3 andthe worm Wheel i1. Consequently the applicator 38 is caused to rotate through the gears 26 and I9, and-gears 20 and 45 operate the screw conveyor 44 which .carries cement continuously to the upper end of the casing 46 and dumps a constant supply thereof on the innermost portion of the applicator roll 38. Excess cement drips from the applicator roll back into the main'body of ce-V `ment which it is desired to apply to the overlasted margin of the upper. Any excess cement is held back by the gauge 60 and finds its way back to the main body of cement in the reservoir 30. Thus, the thickness ofthe cement to be applied may be regulated by varying the position v The operator of the machine holds a shoe so that the overlasted margin of the upper is in contactwith the outermost surface of the roll 38. The shoe isv then advanced and turned so that a band of cement is appliedto the entire surface of the overlasted margin of Athe upper. The fact that the applicator roll 38 juts out from the body of the machine is advantageous, since the yoperator is thereby enabled to ,Watch the coating operation clearly and performaccurate Work. When a relatively thick band of cement is to be applied, the adjusting screw 51 is retracted,` thus yincreasing the distance between the gauge 60 and the roll 38 to allow more cement to pass through. When the machine is not in operation, the applicator roll is removed from the shaft 24 and placed in a can of solvent or other cleaning iiuid. Otherwise cement would harden on the roll and prevent subsequent operation of the machine. To seal the reservoir from the atmosphere, the` gate 63 is vplacedin position and the cover 34 isy secured in closed position by the set screw 36 withthe'cone point Vused for any operation wherein it is necessary to apply a band of cement or other liquid material to the surface of an article. The conveying mechanism is` entirely disposed within the reservoir, and the applicator roll is partially disposed therein. Byv preventing asupply of excess air to the reservoir I have reduced the-rate of evaporation' and made possible the use ofcoating liquids containing relatively volatile constituents. Coagulation of adhesive liquids is avoided and the machine will not gum up, if properly cared for. i

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A liquid coating machine comprising a shaft, bevel gearson each end of said shaft,` an applicatorshaft geared to one of said bevel gears, a screw conveyorgeared to the other bevel gear,

yan applicator roll carried on said applicator shaft adjacent one end of said screw conveyor,v a liquid reservoir encompassing said screw conveyor and a portion of saidapplicator roll, an adjustable gauge block adjacent said applicator roll, a hinged cover on saidreservoir, and a cone point Vbearing threaded into said cover for *engaging base, a shaft journaled on said base with its ends free, bevel gears on either end of said shaft, a

. forwardly inclined applicator shaft geared to one of said bevel gears, an applicatorr roll keyed on the upper end `of said applicatorshaft, a cement reservoir disposed above said base,an `inclined screw conveyor disposed in said reservoiryand v geared to one of the bevel gears on said shaft, 1

said screw conveyor being arranged to discharge cement constantly upon the innermost lsurface ofsaid applicatorroll.

3. A liquid coating machine including a reservoir having a wall with an openingfor an applicator roll, bounded in part by a hinged cover plate, anapplicator roll shaft terminating below the opening and having a slot in its end, arida gate shaped to fill the opening in the Ireservoir, to iit into the slot offfsaid shaft and Atofbef're'- 2,195,323 3 tained in position by engagement of the-,cover and carrying ,an applicator roll'at itsrurpper end, plate. I v r 4. Alquidooating machine comprising a nasev l supporting a reservoir and having a driven shaft 5 journaledi beneath the same, an upwardly nclined shaft geared to one end of the driven shaft to the'other lend of' said driven shaft and located Within the reservoir.-l y n l JAMESk I. yTICKELIS and lanurwva-rdly inclined rvconveyor shaft oonverging toward theapplicator roll. shaft, geared f 

